Hou, 2010, Relationship between flow structure and transfer coefficients in fast fluidized beds, Chemical Engineering Journal, 157, 509, 10.1016/j.cej.2009.12.047
Li, 1994
Yang, 2003, CFD simulation of concurrent-up gas-solid flow in circulating fluidized beds with structure-dependent drag coefficient, Chemical Engineering Journal, 96, 71, 10.1016/j.cej.2003.08.006